If you use JetEngine and you want to edit custom fields on the post types with our plugin, we have created an extension that provides full support for all the field types created by JetEngine.
If you have the latest version of our plugin, you should have seen a pop up after installing prompting you to install the JetEngine extension. If you did not see any pop up, make sure you have the latest version of the plugin and go to the Spreadsheet > Toolbar > Extensions > Choose the JetEngine extension and download it.
More about installing extensions here